5c+2(2c+1) how do I solve this

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

(x-5)1/2+5=2 what is possible solution of this equation

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.